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<body class='hmmessage'><div dir='ltr'><div>Hi, </div><div>I have a nonlinear system with 6 variables grouped in two sets of 3. I am trying to get a fieldsplit preconditioner working . I have the following options set up </div><div><div><br></div><div>-pc_type fieldsplit</div><div>-pc_fieldsplit_type multiplicative</div><div>-fieldsplit_0_fields 0,2,4</div><div>-fieldsplit_1_fields 1,3,5</div><div>-fieldsplit_0_ksp cg</div><div>-fieldsplit_1_ksp cg</div><div>-fieldsplit_0_pc hypre</div><div>-fieldsplit_1_pc hypre</div></div><div><br></div><div>However, I get the following error. My installation of libmesh has block matrices disabled, which I've seen to cause problems with fieldsplit. Any ideas what might cause this error?</div><div>Thanks, </div><div>Subramanya </div><div><br></div><div><br></div><div><br></div><div>[0]PETSC ERROR: --------------------- Error Message ------------------------------------</div><div>[0]PETSC ERROR: Petsc has generated inconsistent data!</div><div>[0]PETSC ERROR: Unhandled case, must have at least two fields, not 1!</div><div>[0]PETSC ERROR: ------------------------------------------------------------------------</div><div>[0]PETSC ERROR: Petsc Release Version 3.4.3, unknown </div><div>[0]PETSC ERROR: See docs/changes/index.html for recent updates.</div><div>[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.</div><div>[0]PETSC ERROR: See docs/index.html for manual pages.</div><div><br></div> </div></body>
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